Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tat van doan snippets" » "tat van doanh snippets", "tat van toan snippets", "tat van hoan snippets", "hat van doan snippets", "sat van doan snippets", "tat tan doan snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("tat van doan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tat van doan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tat van doan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tat van doan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.